I am a prime number.
The double of myself is equal to the square of me.

which number am I?

In which direction should the missing arrow point?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Why do we preferably have round manhole covers and not square ones?

What is the last thing you take off before bed?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59